Abstract
Surface-enhanced Raman scattering (SERS) has been considered a high sensitivity, specificity, and ultra-fast analytical technique in molecular fingerprint recognition. Herein, a kind of sandwich Au/“star-like” mesoporous SiO2/Ag (Au/MSiO2/Ag) hybrid nanostructure was developed by implementing the electrostatic adsorption and magnetron sputtering technology for SERS application. In the experiment, the decoration density of the MSiO2/Ag nanostructure was conveniently adjusted through tuning the washing times of the silicon wafer in ethanol. The prepared substrate with the optimal geometry structure exhibited an enhancement factor (EF) of 9.2 × 105, a limit of detection (LOD) of 5 × 10−5 M, and a low relative standard deviation value of 5.02%. In the end, the obtained hybrid SERS substrate was used to detect nitrofurazone and an excellent LOD of 1 ppm was achieved. Overall, our novel sandwich Au/MSiO2/Ag hybrid SERS substrate provides a rapid and accurate way of monitoring ultra-low trace antibiotics, which can significantly promote food safety.
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Funding
This work was supported by the National Natural Science Foundation of China (Grant No. 61704095); Natural Science Foundation of Zhejiang Province (Grant No. LY19F050002); Natural Science Foundation of Ningbo (Grant No. 2018A610316); Fundamental Research Funds for the Provincial Universities of Zhejiang (Grant No. SJLY2020012); K.C. Wong Magna Fund in Ningbo University, China; and Science and Technology Innovation Project of University of Shanxi Province (Grant No. 2019L0746).
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Niu, Z., Liu, H., Chen, Y. et al. Sandwich Au/SMSiO2/Ag hybrid substrate: synthesis, characterization, and surface-enhanced Raman scattering performance. J Nanopart Res 22, 333 (2020). https://doi.org/10.1007/s11051-020-05066-4
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DOI: https://doi.org/10.1007/s11051-020-05066-4